When switch S in the figure is open, the voltmeter V of the battery reads 3.12 V
ID: 1660349 • Letter: W
Question
When switch S in the figure is open, the voltmeter V of the battery reads 3.12 V . When the switch is closed, the voltmeter reading drops to 2.98 V , and the ammeter A reads 1.68 A . Assume that the two meters are ideal, so they do not affect the circuit. (Figure 1)
Part A
Find the emf E.
Express your answer in volts to three significant digits.
SubmitRequest Answer
When switch S in the figure is open, the voltmeter V of the battery reads 3.12 V . When the switch is closed, the voltmeter reading drops to 2.98 V , and the ammeter A reads 1.68 A . Assume that the two meters are ideal, so they do not affect the circuit. (Figure 1)
Part A
Find the emf E.
Express your answer in volts to three significant digits.
E = VSubmitRequest Answer
Explanation / Answer
Since switch is open no current flow through 'r' hebce there is not any potential drop across ''r'
Hence voltmeter reads EMF of battery which is EMF=3.2V